OBD-II code · Powertrain (generic)
P0659 Actuator Supply Voltage A Circuit High
Same as P0657 with the supply voltage above the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0659?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply voltage above design range
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Actuator Supply Voltage A
Related codes
- P2671Actuator Supply Voltage B Circuit High
- P2686Actuator Supply Voltage C Circuit High
- P26E9Actuator Supply Voltage D Circuit High
- P0656Fuel Level Output Circuit
- P0657Actuator Supply Voltage A Circuit Open
- P0658Actuator Supply Voltage A Circuit Low
- P065AGenerator System Performance
- P065BGenerator A Control Circuit Range or Performance
- P065CGenerator A Mechanical Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.